vbox_ga_install_logs

# VBox GA install working on CentOS build
# packer build -var-file=vars/centos-7.2.1511.json -var-file=vars/opendaylight-4.1.0.json templates/virtualbox.json
    virtualbox-iso: + sudo /mnt/VBoxLinuxAdditions.run
    virtualbox-iso: Verifying archive integrity... All good.
    virtualbox-iso: Uncompressing VirtualBox 5.0.16 Guest Additions for Linux............
    virtualbox-iso: VirtualBox Guest Additions installer
    virtualbox-iso: Copying additional installer modules ...
    virtualbox-iso: Installing additional modules ...
    virtualbox-iso: Removing existing VirtualBox non-DKMS kernel modules[  OK  ]
    virtualbox-iso: Building the VirtualBox Guest Additions kernel modules
    virtualbox-iso: Building the main Guest Additions module[  OK  ]
    virtualbox-iso: Building the shared folder support module[  OK  ]
    virtualbox-iso: Building the OpenGL support module[  OK  ]
    virtualbox-iso: Doing non-kernel setup of the Guest Additions[  OK  ]
    virtualbox-iso: Starting the VirtualBox Guest Additions [  OK  ]
    virtualbox-iso: Installing the Window System drivers
    virtualbox-iso: Could not find the X.Org or XFree86 Window System, skipping.

# VBox GA install failing on Fedora 23 build
# packer build -var-file=vars/fedora-23.json -var-file=vars/opendaylight-4.1.0.json templates/virtualbox.json
   virtualbox-iso: + sudo /mnt/VBoxLinuxAdditions.run
    virtualbox-iso: Verifying archive integrity... All good.
    virtualbox-iso: /mnt/VBoxLinuxAdditions.run: line 137: /dev/tty: No such device or address
    virtualbox-iso: Signal caught, cleaning up